Cervical caps and spermicide can have some side effects, but they’re totally safe for most people.

Is the cervical cap safe for me?

The cervical cap is totally safe for most people. But the cervical cap may not work for you if:

you're not comfortable putting your fingers in your vagina

you have trouble putting in the cervical cap

you gave birth or had an abortion in the last 6 weeks

you're sensitive or allergic to silicone or spermicide

you have cervical cancer or other cervical conditions

you or your partner have HIV/AIDS

you've had toxic shock syndrome

You shouldn't use the cervical cap during your period. It could increase your risk of infection. And don’t use a friend’s cervical cap or let a friend use yours.

Your nurse or doctor can help you decide if the cervical cap is safe for you.

What are the risks of using a cervical cap?

Spermicide makes cervical caps a lot better at preventing pregnancy. But the chemical in most spermicides, nonoxynol-9, has some risks. If you use spermicide many times a day, it can irritate your vagina and increase your risk of HIV and other sexually transmitted infections. If you’re worried about the spread of STDs, use condoms along with your cervical cap and spermicide to protect yourself.

Some people or their partners might feel pain or discomfort when using the cervical cap. If you notice that your vagina feels sore or irritated after you use your cervical cap, it could be that you're sensitive to the spermicide or the material that the cervical cap is made of. You can try a different brand of spermicide and see if that makes a difference. If the irritation feels really bad or if switching brands doesn't help, talk to your doctor.

You should also talk to your doctor if:

your cervical cap feels uncomfortable

your vulva or vagina is sore, itchy, red, or swollen

you have discharge from your vagina that's different from your normal discharge

you keep getting bladder infections

These things may mean that something is wrong. Most problems are easy to treat, so don’t worry — just talk to your doctor as soon as you can.

Also watch out for signs of toxic shock syndrome. It’s extremely rare, but take your cervical cap out and call your doctor right away if you notice: